CN103148225B - Be particularly useful for the distributing valve that break-make is in the fluid of high pressure - Google Patents

Be particularly useful for the distributing valve that break-make is in the fluid of high pressure Download PDF

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Publication number
CN103148225B
CN103148225B CN201210511389.7A CN201210511389A CN103148225B CN 103148225 B CN103148225 B CN 103148225B CN 201210511389 A CN201210511389 A CN 201210511389A CN 103148225 B CN103148225 B CN 103148225B
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CN
China
Prior art keywords
valve
distributing
housing
base piece
housing section
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Active
Application number
CN201210511389.7A
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Chinese (zh)
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CN103148225A (en
Inventor
M·哈克勒
R·施罗德尔
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Dionex Softron GmbH
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Dionex Softron GmbH
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K15/00—Check valves
    • F16K15/02—Check valves with guided rigid valve members
    • F16K15/04—Check valves with guided rigid valve members shaped as balls
    • F16K15/042—Check valves with guided rigid valve members shaped as balls with a plurality of balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/10—Valves; Arrangement of valves
    • F04B53/1002—Ball valves
    • F04B53/1005—Ball valves being formed by two closure members working in series
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K25/00—Details relating to contact between valve members and seat
    • F16K25/005—Particular materials for seats or closure elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/0245—Construction of housing; Use of materials therefor of lift valves with ball-shaped valve members
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
    • G01N30/02—Column chromatography
    • G01N30/26—Conditioning of the fluid carrier; Flow patterns
    • G01N30/28—Control of physical parameters of the fluid carrier
    • G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
    • G01N2030/328—Control of physical parameters of the fluid carrier of pressure or speed valves, e.g. check valves of pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7904—Reciprocating valves
    • Y10T137/7908—Weight biased
    • Y10T137/7909—Valve body is the weight
    • Y10T137/791—Ball valves

Abstract

The present invention relates to and be a kind ofly particularly useful for the distributing valve that break-make is in the fluid of high pressure, it has at least one valve cell, it comprises valve base piece and the on-off element of guiding movement in guiding element, this valve base piece and this on-off element are worked in coordination to realize distributing valve function, this valve base piece and this guiding element are located in housing, and this valve base piece, this guiding element and this housing are configured for the circulation passage treating break-make fluid.According to the present invention, between the inwall of this housing and the outer wall of the outer wall of this valve base piece and this guiding element, the Sealing that is provided with elastically deformable and/or plastically deformable in the space of all round closure, the seal is in predetermined pressure also therefore relative to this circulation passage of this housing seal, and applies inside pretightening force to this valve base piece and this guiding element.

Description

Be particularly useful for the distributing valve that break-make is in the fluid of high pressure
Technical field
The present invention relates to according to a first aspect of the present invention, be particularly useful for the distributing valve that break-make is in the fluid of high pressure.
Background technique
In liquid chromatography analytic method and especially in high efficiency liquid chromatography analytic method (HPLC), many materials are so separated, and they are by high pressure and be rinsed by chromatographic analysis post by solvent.For producing the liquid stream required for this, need pump, this pump under high pressure can provide usually very little constant flow velocity continuously.Be separated more clearly for obtaining in HPLC more fast or differentiating, adopt more and more higher pressure in recent years.
In order to produce fluid pressure, in HPLC, often adopt reciprocating pump.This pump generally have employed passive check valve at entrance and exit, and it is formed mainly with ball valve form greatly.Make-break operation is carried out in the pressure reduction direction that act on valve (or relevant on-off element) of such safety check existing for liquid stream to be controlled, on the contrary in other words according to from blocking be transferred to open mode or the liquid flow path direction flowing through valve circulation passage carry out make-break operation.This valve always has valve seat, in spherical on-off element with guide the guiding element of break-make motion of on-off element.Valve base piece and on-off element must be made up of, to allow sufficiently high surface pressure for the high pressure that will operate when being in blocking the very hard and material possessing tolerance respectively.Now generally in spherical on-off element be made up of ruby, valve seat is made up of sapphire.But such as stupalith is as AlO 2or ZrO 2also be applicable to manufacture these elements.The advantage of these materials is, they are very hard and withstand voltage.These materials are needed to be that this pressure may be many times of hydraulic pressure because there is the pressure that local is high in the surface of contact region in sealing surface region namely between valve base piece and on-off element.
In order to improve the reliability of such safety check, complete valve in common housing valve cell and form a double check valve in other words can be located at by tandem two (even more).Thus one of two valve cells to be complete be the especially in the lockout condition sealing in other words of one of one, two valves be just enough to ensure display function.
The element of a valve cell i.e. on-off element of especially valve base piece and activity-oriented movement in guiding element is needed so to seal in order to realize the correct function of safety check, the valve cell at all not having liquid to flow through this safety check because giving away secrets in blocking to be correlated with in other words.For this reason, the multiple independent constituent element of valve must mutually seal and be sealed relative to the housing holding them.The maximum pressure of the necessary withstand long term exposure stress alternation of this sealing and even pump.
Although ruby, sapphire and pottery are very withstand voltage, lower tensile stress can only be tolerated.Because valve base piece and the guiding element for on-off element have one (being axial mostly) usually for treating the opening that break-make liquid stream flows through and therefore fluid pressure acts on the inwall of this element, so, occurred (especially azimuthal or tangential) tensile stress when the wall distortion of this element, it may cause Materials Fracture.Ball acts on the pressure of valve seat be made up of the surface of contact tilting to extend relative to fluid communication port axis for on-off element ball in other words and valve base piece can be caused to rupture by the tensile stress of final (being azimythal angle mostly).
In known safety check, in order to mutually seal constituent element or relative to housing seal constituent element (in other words, sealing the circulation passage limited by constituent element), be aware of various possibility.
Generally, especially valve base piece and guiding element are installed in metal sleeve together with the on-off element be accommodated therein all constituents of valve cell.The lid that is made up of PEEK is employed for sealing whole unit at the two ends of sleeve pipe.Two valve cells also can be set in metal sleeve, in the case it is known that use another the thin diaphragm seal be made up of PEEK between two valve cells of double check valve.This design is all reliable when the force value up to about 1000 bar.But occur following problem under high pressures, lid can obvious plastic deformation giving away secrets along with time history when Long-Time Service.
Another kind may be, also uses thin PEEK sheet or tinsel at two ends, just as in the valve shown in EP1514027B1.But utilize such sheet to carry out side sealing, this requires complicated structure for two ball valve.In addition, Surface Structures and quality propose to be strict with.Intensive groove is such as proposed in EP1514027B1.
For the problem that the steadiness of valve seat and guiding element is restricted because there is tensile stress, known in controlled mode of giving away secrets to form the surface of contact between valve seat and spherical guiding element, with realize inside and outside between pressure balance.So must seal two asking between two of valve single valves, this region is also sealing relative to sleeve pipe.
Also disclose and valve base piece be pressed in metal ring and on radial inward direction, apply pretightening force thus.The shortcoming of this modification is associated additional processing cost.
Finally have following possibility, the guiding element for on-off element is not be made up of pottery, but is manufactured by stainless steel, and it has higher tensile strength.But the firm shape problem of valve base piece cannot solve in this way, because stainless steel is not suitable material for valve seat (with yet for on-off element).
Disclose from US2011/0094954A1, the outer circumferential face of valve seat is constructed the tapered and valve seat mating member by shape complementarity by axial pretightening.Thus, also produce the pretightening force with the component of radial inward, it can stop a part for the expansion produced by hydrodynamic pressure of annular valve base piece., this flexible program requires higher processing cost and more complex-shaped component, especially when two ball valve.
Summary of the invention
In view of the prior art, the present invention is based on following task, there is provided a kind of and be particularly useful for the distributing valve that break-make is in the fluid of high pressure, it has simple structure and a small amount of component, and under extremely high pressure, also ensure that the long wear life life-span of make-break operation in other words, and ensure that high reliability and sealing.
The present invention utilizes first aspect present invention to complete this task.
The present invention comes from following understanding, namely, by elastically deformable is set in the space of all round closure arranged around valve cell and/or the Sealing of plastically deformable, if Sealing is in predetermined pressure in the space of this all round closure, then can by the constituent element of the mutual seal valve unit of the simplest mode and relative to this constituent element of housing seal that this valve cell is housed.Thus, Sealing be out of shape and enter the little opening will closed separately.Certainly, select sealing member material so for this reason, that is, make it have sufficiently high structural strength, so that itself can not through little opening to be closed depart from main body, thus cause it broken and the also final pressure reduced because of material unaccounted-for (MUF) in all round closure space.The maximum admissible dimension at the position to be sealed in all round closure space must be matched with sealing member material certainly, otherwise or, seal material must be matched with the size at position to be sealed.
Meanwhile, the Sealing being in pressure make the besieged constituent element of valve cell especially valve sit part and the guiding element for on-off element can by pretension radially.Thus, Sealing is similar to the effect playing solid hydraulic medium, and it can be so stressed when being installed on arbitrary position, that is, in the volume of Sealing, form approximate constant pressure, this pressure acts on the outer wall of the besieged constituent element of this valve cell.Because the compressibility of sealing member material and have small―gap suture between Sealing and the constituent element of encirclement, so, the volume in the space of this all round closure is needed to reduce in order to the sufficiently high pressure produced in material.
According to the preferred embodiment of the present invention, the pressure in Sealing is selected as higher than the maximum pressure treating break-make fluid in circulation passage.
According to an embodiment of the invention, this housing can be at least made up of two-part, wherein, the accommodation recess for valve base piece, guiding element and Sealing is provided with in the first housing section, and the second housing section is connected with the first housing section, when valve is installed, the second housing section exerts a force to Sealing, to produce desired pressure in Sealing at the end face towards it in the space (this space is in the form in this space ringwise) of all round closure.
Accommodation recess in first housing section can be cylindricality, preferably cylindrical.This is also applicable to valve base piece and guiding element, and they can have the cylindrical outer wall preferably alignd vertically.If hold recess and the cross section of valve cell that is made up of valve base piece and guiding element (comprising on-off element located therein) is all cylindrical, then obtain circular ring-shaped space, this annular space can be clogged by the Sealing of corresponding simple shaping.
In order in associated end face close this all round closure space and in order to produce the pressure in Sealing, the second housing section can be connected with the first housing section separably, preferably by being threaded.Second housing section can have annular protrusion for this reason, and this annular protrusion is bonded in the space of this all round closure and also closes it, and exerts a force to Sealing.By the respective threaded in the first and second housing section, can smoothly and the desired pressure in housing or Sealing need not be obtained too arduously, if need also can be regulated delicately.
According to an embodiment of the invention, this guiding element can have the recess holding on-off element, and this recess is so formed, that is, define this on-off element and leave the motion that this valve seat enters this valve open position vertically.For this reason, this guiding element can have the opening of the associated wall being positioned at this guiding element in the side away from valve seat, flow through for fluid, wherein, inwall towards this on-off element is so formed, that is, on-off element against time also leave enough large opening and flow through by fluid.
When distributing valve is installed, by surrounding the plastic deformation of the housing parts in this all round closure space, the volume in this all round closure space is so reduced from the original state after installing and close this all round closure space, that is, obtains the predetermined pressure in the seal.
As described in the prior art, distributing valve of the present invention also can the form of bivalve or multi-way valve be formed.Sealing can surround at least another valve cell in such mode of execution, and it aligns with the first valve cell and forms circulation passage, and this circulation passage circulates with the circulation passage of the first valve cell and connects.
Described at least another valve cell now can be formed identically with the first valve cell.These two valve cells are now mutually direct against, thus Sealing (it also surrounds the seaming position between two valve cells) this seaming position salable vertically.Meanwhile, can realize vertically by the radial direction of the outer wall to two valve cells force fixing.
But, certainly can be fixed in the accommodation recess of housing by also additional vertically at least one valve cell described, preferably also radially applying to complete before pressure to outer wall by Sealing, be separated from each other to avoid the axis of valve cell relevant components part in other words.This is because perhaps may occur so large gap between the adjacent constituent elements of the axis of at least one valve cell in this way, this gap reliably cannot be closed by Sealing or this gap can cause Sealing damaged.
As mentioned above, on-off element can in spherical, and this causes very simple valve arrangement.
On-off element or valve base piece can be made up of stiff materials, preferably by ruby, sapphire or stupalith as AlO 2or ZrO 2form.
Valve chest can be made up of the sufficiently high metallic material of tensile strength, is preferably made up of stainless steel or titanium alloy.
Thermoplastic is particularly suited for serving as sealing member material, preferably polyether-ether-ketone (PEEK).But such as also can use polyethylene (PE) or teflon (PTFE) material.
According to an embodiment of the invention, the outer wall of valve chest is formed by Material selec-tion and/or by geometry design at least one regional area that it defines all round closure space with coming elastically deformable like this or plastically deformable, namely, from the predetermined pressure in Sealing, although this all round closure space reduces further in stress area, but pressure so keeps constant, or the rising that so eases off the pressure, namely, by the distortion of this wall, the total volume in all round closure space is remained unchanged substantially, or what make this total volume reduces the volume-diminished be less than in this stress area.Make when housing is made up of two-part thus, the Sealing inner high voltage that error that valve constituent element adds man-hour can not cause when valve is installed not allowing can be realized, especially in the second housing section for other valve constituent element to be fixed in housing and in the mode of execution that must be connected with the first housing section on assigned position when mounted correspondingly.
By obtaining other mode of execution of the present invention in dependent claims.
Accompanying drawing explanation
The present invention is described in detail below with reference to embodiment shown in the drawings.
Fig. 1 illustrates a mode of execution of the distributing valve of the present invention of form of check valve spherical in shape with schematic cross-section.
Embodiment
Safety check 1 shown in the schematic longitudinal section of unique accompanying drawing can realize with independent component form, or can be incorporated into another total body unit not shown further as in pump.Safety check 1 comprises housing 3, and it can be made up of two-part or more part.If valve 1 is incorporated in another assembly, then housing 3 also can combine with the housing of another assembly or other constituent element certainly.Especially, housing 3 can the associated shell of pump head or main body Combining with terrain become in other words with the pump head of HPLC pump.
In the embodiment shown in the figures, housing 3 is made up of the first housing section 5 and the second housing section 9, the cylindricality that first housing section 5 has other constituent elements for holding safety check is held recess 7, second housing section 9 and to be connected with the first housing section 5 and the opening of recess 7 is held in deadend.For this reason, can arrange screw thread respectively as in mode of execution as shown in drawings in the accommodation upper area of inwall of recess 7 and the region of the outer wall of the second housing section 9, this outer wall area is at least being bonded in the region held in recess 7 also in cylindricality.These two screw threads allow the detachable connection between the first and second housing section 5,9.But other removable or non-disconnectable Connecting format can certainly be adopted between two housing section 5,9, such as, by welding, soldering, bonding or crimping.
Other constituent element being contained in the valve 1 held in recess 7 is the first valve cell 11 and second valve cell 13 with same structure.
Housing 3 and valve cell 11,13 limit circulation passage 15, and its entrance 15a is on the bottom surface of the first housing section 5, and it is for treating that the outlet 15b of break-make fluid is in the second housing section 9.Safety check shown in the drawings is the exclusive path of fluid.Multi-path distribution valve (principle of the invention also can be used to it) also can be multiple communication path.Such as, this valve can so be formed, that is, the liquid stream of arrival is optionally switched in one of other path multiple.
The basic constituent element of the valve cell 11,13 of ball check valve is as shown in the figure valve base piece 17 and the on-off element in ball 19 shape respectively, and this ball can axially movably be contained in the guide recess 21 of guiding element 23 substantially.The valve base piece of each valve cell 11,13 is substantially ring and has the face of taking a seat 25 at coaxial openings place, and the shape in this face of taking a seat and the outer surface of ball 19 are complementally formed, to ensure the sealing on the lock operation position of valve 1.
Shown ball check valve is in lock operation position in the following cases: the hydrodynamic pressure in circulation passage 15, is greater than the region (namely on entrance 15a direction) below the face of taking a seat in other words at ball 19 upper area in the region of that side, the face of taking a seat 25 (namely on outlet 15b direction).Under contrary pressure condition, be in opening operation position, wherein, make ball 19 by final liquid stream the flow direction on (namely towards outlet 15b direction on) motion, until this ball bumps against the bottom surface of the guide recess 21 of each guiding element 23.
These guiding elements 23 are can-like and have the communication port 23a flow through for fluid in bottom surface.The guiding element 23 of design like this ensure that ball 19 can not leave lock operation position too far, and (along circulating direction) can install other constituent element additional.This bottom surface is that rotation asymmetry is formed in inner side in communication port 23a region, and thus, although ball 19 stroke limiting, outlet 23a can not close.
The valve base piece 17 of valve cell 11,13 such as can be made up of sapphire, and ball 19 can be made up of ruby.AlO 2stupalith and ZrO 2stupalith also can be used to these constituent elements.The guiding element 23 of valve cell 11,13 such as can by AlO 2pottery is formed.
The double arrangement of ball check valve unit 11,13 improves the fail safe of valve 1.If a valve cell 11,13 is given away secrets, then another valve cell 13,11 also always ensures the sealing of valve.
As shown in the figure, valve base piece 17 and guiding element 23 have external frame respectively, and it is substantial alignment in the axial direction.With between valve cell 11,13 constituent element be located in accommodation recess 7 and the inwall holding recess 7, namely in relevant annular space, be provided with Sealing 27.Sealing 27 is not preferably bearing (in this case sleeve-shaped) structure under pressure state with complementation.The axial overall length of Sealing 27 is preferably substantially equal to the axis extension size of these two valve cells 11,13.But at least the position of Sealing 27 and total length should be such, that is, all openings to be sealed and gap (see below) are hidden (and the annular space around Sealing 27 is closed) by Sealing 27.
At this it should be noted that term " annular space " is herein used for such space by broad sense, it between the outer wall formed arbitrarily and the inwall formed arbitrarily, and can be closed the annular space of a formation all round closure at underside side and top side.
In order to install valve, first manufacture a unit be made up of valve cell 11,13 and suit Sealing 27 sleeve pipe thereon.Whole unit can be pushed in the accommodation recess 7 of the first housing section 5 subsequently.Subsequently, from top, the second housing section 9 and the first housing section 5 can be coupled together (being screwed in the embodiment shown).
Second housing section 9 has annular protrusion 9a being bonded on the region held in recess 7, and this annular protrusion is bonded on valve cell 13 and holds between recess 7 and (gap except allowing) closes this annular space substantially in the upper area of annular space.Therefore, the annular space holding Sealing 27 is all round closure (except the gap allowed).
Second housing section 9 is so inserted in the accommodation recess 7 of the first housing section with annular protrusion 9a deeply, that is, Sealing 27 is in predetermined pressure.Plastically deformable and/or Sealing 27 material of elastically deformable be out of shape at this pressure and fill up whole annular space.This material is now also sealed in the little gap of valve constituent element each other or between housing section 5,9 and valve constituent element or opening.Thus, realize on the one hand this annular space and and then circulation passage 15 relative to the sealing completely of housing 3.Close this annular space completely by reality, this material all " is not extruded " in any position, even if the pressure in material is far above its yield point.On the other hand, the Sealing 27 being in pressure produces the radial tightening of valve base piece 17 and guiding element 23 simultaneously.Because especially valve base piece 17 is made up of stiff materials, it can only bear relatively low tensile stress but can bear high compressive stress and can not be damaged, so must at least select so large pretightening force, namely, under given fluid maximum pressure, in related elements, only produce such (azimuthal or tangential) compressive stress, it is lower than the limit that may cause element rupture.For the purpose of safety, in fact can certainly specify an enough large safe clearance.But because be in sealing to consider and advise the pressure selection in Sealing 27 to be greater than hydrodynamic pressure to ensure the sealing of valve 1, so, anyway ensure that the highest occurred tensile stress is less than the damaged limit in the case.
This pretension also reduces tensile stress, and this tensile stress acts on the face of taking a seat 25 of valve base piece 17 by ball 19 pressure when valve cuts out produces.Because stiff materials is as very withstand voltage in sapphire, ruby or stupalith, so the hydrodynamic pressure that people not only select high preload pressure to come in flow compensated circulation passage 15, but also extra selection to recline the radial force that valve seat produces because of on-off element 20, this radial force will cause valve element to be expanded, and and then causes because azimuthal tensile stress of occurring tangential tensile stress and damage this valve element in other words.
The material being applicable to housing 3 housing section 5,9 is in other words tension metal or metal alloy, especially stainless steel or titanium alloy.
Therefore the valve 1 with this structure has following advantage, namely, though for valve constituent element have the high hardness of expectation and compressive strength the unfavorable mechanical property with the material (as sapphire, ruby or pottery) of low tensile strength is compensated, and such as compensated as the unfavorable performance of thermoplastic material as PEEK for the material of Sealing, this material is sufficiently soft to play seal action on the one hand, and under high pressure can damage (not limiting completely) on the other hand.
Because the sealing by the valve 1 of lip ring 27 only needs little annular cross section (namely Sealing 7 has very little wall thickness), so, can utilize smaller, be applied to the power on the corresponding little end face of Sealing 27 by the second housing section 9, in Sealing 27, produce very high pressure.
Replace the pretightening force producing Sealing 27 by installing (be preferably threaded the second housing section 9 and the first housing section 5), also (or additionally) plastic deformation like this in Sealing 27 region of the wall in the hollow cylindrical region of the first housing section 5 can be made, that is, to be positioned at the volume of annular space wherein reduced and form the pressure expected correspondingly at Sealing 27 for Sealing 27.The variation of wall is as realized by the bending of metallic walls.
Certainly, a whole set of flexible program of illustrated embodiment is feasible.Such as, valve base piece 17 can be formed integratedly with guiding element 23.When double check valve or multichannel safety check, then for on-off element in other words ball 19 backstop can by after separately (flowing to) with or the valve base piece 17 that is located thereon form.Be positioned at last valve cell in the flow direction, this backstop can be formed by the second housing section 9.In the case, housing section 5 also integrally can be formed to this guiding element and directly or at least fully near relevant valve base piece.
In the embodiment shown in the figures, between the second housing section 9 and the guiding element 23 of the top (namely adjacent with the second housing section 9 vertically), occur gap, this gap is as dead volume 29.Because do not wish dead volume in some applications, so guiding element 23 adjacent with the second housing section 9 vertically also can be exerted a force by the end face inwardly of the second housing section 9, thus dead volume 29 is reduced or eliminates completely as far as possible.For this reason, the second housing section 9 is corresponding to be formed (as shown in the figure) thickly, or is designed to be screwed into the first housing section 5 by the larger axis of being located in the first housing section 5 further to the screw thread in length range.So when valve 1 is installed, the second housing section 9 will be so screwed in the first housing section deeply, until it encounters adjacent guiding element 23.Meanwhile, certainly also the seal 27 is compressed.
According to another mode of execution, formation like this defines Sealing and is arranged in the valve chest outer wall in the space of all round closure wherein (in modification as shown in the figure, the wall of the first housing section 5), that is, the seal is elastically deformable or plastic deformation in whole delimited area or in a part area.The characteristic of this housing in this wall region now preferably so designs, namely, from predetermined pressure, although this space reduces further in the zone of action, but utilize the second housing section (it is housing section 9 in modification shown in the drawings), volume is totally remained unchanged by following manner: make this wall on other position or in other region according to corresponding manner plastic deformation.Such as in the embodiments shown in the drawings, the wall defining annular space can be such at material and vpg connection, that is, wall (desirably mode) " protuberance " according to the rules in this region.Can accomplish in this way, the pressure in Sealing (is similar to) from certain threshold value constantly remains on specified value.If successfully cannot accomplish that the pressure in the volume in this all round closure space and Sealing accurately remains unchanged from defined threshold, also can at least allow " pressure increase " to show from certain threshold value whereby less than there is no the wall of plastic deformation performance.
In such mode of execution, such as the second housing section 9 as shown in the figure can be screwed in the first housing section 5 so far, until it is fixed in housing against relevant guiding element 23 with its end face.In other words, the annular protrusion 9a of the second housing section 9 is when the second housing section 9 is screwed into the first housing section 5, from certain position and then from certain pressure in Sealing 27, although also cause reducing of the volume in the space of this all round closure (annular space of mode of execution shown in the drawings), but, the total volume in the space of this all round closure no longer reduces or no longer with this degree diminution, this is because the wall of housing 3 in other words the first housing section 5 wall occur distortion, and this region produce volume increase.
Like this, the dead volume between the second housing section 9 and guiding element 23 is eliminated, and machining error does not cause Sealing 27 internal pressure of not allowing to increase.
Although below only by reference to the accompanying drawings shown in safety check describe the present invention, the present invention also relates to all possible valve mode of execution, wherein have employed according to of the present invention, there is the sealing of the constituent element of the valve cell of any structure and the method for pretension.Such as the on-off element of distributing valve of the present invention also can so be formed, that is, it can (manually or by controllable operating unit) motion on one's own initiative between two or more operating position.
Reference numerals list
1 safety check; 3 housings; 5 first housing section; 7 cylindricalitys hold recess; 9 second housing section; 9a annular protrusion; 11 first valve cells; 13 second valve cells; 15 circulation passages; 15a entrance; 15b exports; 17 valve base pieces; 19 balls; 20 on-off elements; 21 guide recess; 23 guiding elements; 23a communication port; 25 take a seat face; 27 Sealings; 29 dead volume.

Claims (24)

1. be in a distributing valve for the fluid under pressure for break-make, this distributing valve has:
(a) at least one valve cell (11,13), at least one valve cell described comprises valve base piece (17) and the on-off element (20) of guiding movement in guiding element (23), wherein, this valve base piece (17) and this on-off element (20) are worked in coordination to realize distributing valve function
B () wherein, this valve base piece (17) and this guiding element (23) are located in housing (3), and this valve base piece (17), this guiding element (23) and this housing (3) are configured for the circulation passage (15) treating break-make fluid
It is characterized in that,
(c) the inwall and this valve base piece (17) that are positioned at this housing (3) outer wall and and the outer wall of this guiding element (23) between, the space of all round closure is provided with the Sealing (27) of elastically deformable and/or plastically deformable, the seal is in predetermined pressure and therefore seals this circulation passage (15) relative to this housing (3), and applies inside pretightening force to this valve base piece (17) and this guiding element (23).
2. distributing valve according to claim 1, is characterized in that, the predetermined pressure in the seal (27) is greater than the maximum pressure treating break-make fluid in this circulation passage (15).
3. distributing valve according to claim 2, it is characterized in that, this housing (3) is made up of at least two parts, the accommodation recess (7) for this valve base piece (17), this guiding element (23) and the seal (27) is provided with in the first housing section (5), second housing section (9) is connected with this first housing section (5), this second housing section exerting a force to the seal (27) on the end face of this second housing section at annular space.
4. distributing valve according to claim 3, it is characterized in that, this accommodation recess (7) in this first housing section (5) is cylindricality, and this valve base piece (17) and this guiding element (23) all have cylindrical outer wall.
5. distributing valve according to claim 4, is characterized in that, this accommodation recess (7) is for cylindrical.
6. distributing valve according to claim 4, is characterized in that, this valve base piece (17) and this guiding element (23) all have the cylindrical outer wall post axially aligned each other.
7. according to the distributing valve one of claim 3 to 6 Suo Shu, it is characterized in that, this second housing section (9) is connected separably with this first housing section (5), and this second housing section (9) has annular protrusion (9a), this annular protrusion joins to exert a force to the seal (27) in this annular space, and this annular protrusion closes this annular space.
8. according to the distributing valve one of claim 1 to 6 Suo Shu, it is characterized in that, this guiding element (23) has the recess (21) for holding this on-off element (20), this recess so constructs, that is, define this on-off element (20) and leave the motion that this valve seat enters the open position of this distributing valve (1) vertically.
9. according to the distributing valve one of claim 1 to 6 Suo Shu, it is characterized in that, by the plastic deformation of the part in the space of this all round closure of encirclement of housing (3), the volume in the space of this all round closure is so reduced from the original state after installing and close the space of this all round closure, that is, the predetermined pressure in the seal (27) is obtained.
10. according to the distributing valve one of aforementioned claim 1 to 6 Suo Shu, it is characterized in that, the seal (27) surrounds at least one other valve cell (13), and this at least one other valve cell aligns with the first valve cell (11) and constitutes the circulation passage circulated of connecting with the circulation passage of this first valve cell (11).
11. distributing valves according to claim 10, it is characterized in that, at least one other valve cell (13) described has the structure identical with this first valve cell (11), and these valve cells (11,13) are axially directly closely arranged.
12., according to the distributing valve one of claim 1 to 6 Suo Shu, is characterized in that, this on-off element (20) is made up of stiff materials.
13. distributing valves according to claim 12, is characterized in that, this on-off element (20) is made up of ruby, sapphire or stupalith.
14. distributing valves according to claim 13, is characterized in that, this stupalith is AlO 2or ZrO 2.
15., according to the distributing valve one of claim 1 to 6 Suo Shu, is characterized in that, this valve base piece (17) is made up of stiff materials.
16. distributing valves according to claim 15, is characterized in that, this valve base piece (17) is made up of ruby, sapphire or stupalith.
17. distributing valves according to claim 16, is characterized in that, described stupalith is AlO 2or ZrO 2.
18., according to the distributing valve one of claim 1 to 6 Suo Shu, is characterized in that, this housing (3) is made up of metallic material.
19. distributing valves according to claim 18, is characterized in that, this housing (3) is made up of stainless steel or titanium alloy.
20., according to the distributing valve one of claim 1 to 6 Suo Shu, is characterized in that, the seal (27) is made up of thermoplastic.
21. distributing valves according to claim 20, is characterized in that, the seal (27) is made up of polyether-ether-ketone (PEEK).
22., according to the distributing valve one of claim 1 to 6 Suo Shu, is characterized in that, this distributing valve is configured to safety check.
23. distributing valves according to claim 22, is characterized in that, this on-off element (20) is in spherical.
24. according to the distributing valve one of claim 1 to 6 Suo Shu, it is characterized in that, the outer wall of this housing (3) of this distributing valve (1) is formed by Material selec-tion and/or by geometry design at least one regional area that it defines the space of described all round closure with coming elastically deformable like this or plastically deformable, namely, from a predetermined pressure, although the space of this all round closure reduces further in stress area, but the pressure in the seal so keeps constant, or the rising that so eases off the pressure, namely, made the total volume in the space of described all round closure substantially remain unchanged by the distortion of this outer wall, or what make this total volume reduces the volume-diminished be less than in this stress area.
CN201210511389.7A 2011-12-06 2012-12-04 Be particularly useful for the distributing valve that break-make is in the fluid of high pressure Active CN103148225B (en)

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DE102011056094B4 (en) 2014-05-28
CN103148225A (en) 2013-06-12
US9133944B2 (en) 2015-09-15
US20130139913A1 (en) 2013-06-06
EP2602518A1 (en) 2013-06-12

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